Manifolding apparatus for printing from mirror script originals on premoistened sheets or the like



Aug. 25, 1936. w. RITZERFELD 21,51,897

MANIFOLDING APPARATUS FOR PRINTING FROM MIRROR SCRIPT ORIGINALS ONPREMOISTENED SHEETS OR THE LIKE Filed Oct. 50, 1934 A "-2 l /0 1 6 .9\I/ h i l t 7 a E i 1 |T l i I h k \KJ INVENTOR W/LHELM fi/TZERFELOflTTOfr/VEY .Patentecl Aug. 25, 1936 UNITED STATES MANIFOLDING APPARATUSFOR PRINTING FROM MIRROR SCRIPT ORIGINALS ON PREMOISTENED SHEETS OR THELIKE Wilhelm Rltzerfcld, Berlin, Germany Application October 30, 1934,Serial No. 750,612

Germany November 10, 1933 8 Claims. (Cl. 101-132) The invention relatesto an improvement and a simplification of manifolding apparatus in whichis printed from mirror script original on to sheets or the likepreviously evanescently moistened with a readily volatile liquid.-

Manifolding apparatus of this kind were already proposed, but they weretoo complicated 'as for construction and too expensive for use in littlehotels, clubs, offices or the like. Small and cheap manifoldingapparatus of good and reliable construction were not yet on the market.

This want for an apparatus is fulfilled by the present invention whichshows a very simple and cheap construction.

The principal feature of the apparatus according to the invention isgiven by the fact, that the least number of parts or element availableis used for all necessary work to be done.

This is effectuated by combining the functions" of several parts orelements of the former apparatus in one part in the new apparatus.Therefore a great number of parts used formerly can be avoided and thewhole machine is much more simplified and therefore much cheaper.

35 The apparatus consists-just as the previous models, of one impressingdrum for the original written in mirror script, one counter pressingroller and a pivoted moistening device fastened before them. By thismoistening device the sheet to be printed on is covered with a film of avolatile liquid, suitable to dissolve the script on the original. V

The printing drum consists of a hollow drum as it is already known andis stiffened by one 85 or more crossing bars. According to the inventionone of these parts is placed in such a manner, relatively to themounting device for the original, that it may serve as support for a camshaped surface which lowers the moistening de- 40 vice to the sheet tobe printed on in the moment,

in which it is passing through between the impressing drum and thecounter pressing roller.

Whilst the apparatus formerly known had a special device for holding theimpressing drum 45 in the initial position, the above mentioned camshaped surface attached to the stiffening bar of the impressing drumfulfills also this task, and fixes the impressing drum in its initialposition, that means the position the apparatus must show 50 when sheetsto be printed on are fed in. Furthermore the position of the impressingdrum with the original fixed on it must be such one that the originaland the sheet must cover one another entirely. For this purpose thereinforcing bar 55 or spoke of the printing cylinder and the camshapedsurface secured thereto have to be located in such relation to theclamping device that the apparatus is caused to stop at the properinitial 7 position. A further simplification and diminution of the meansfor mounting the original on the impressing drum is provided too. Theimpressing drum previously used had a special clamping device for theoriginal. Accordingto this contrivance the impressing drum and clampingdevice consist only of one part. The hollow 10 drum therefore in itsinterior is furnished with a bulb extending in cross direction. a On itssurface it shows a slit or recess in order to receive the original to bemounted thereo The relative position of the clamping means on theprinting cylinder and of the cam-shaped member mounted on a spoke ofsaid cylinder, whichcontrols the moistening device and deter- ,mines theinitial position of the apparatus, is

such that the clear sheets are introduced and pressed against the,"copyable original in the .correct position. The-slit for fixing theoriginal is very narrow and cut prone and in forward direction into theimpressing drum. By this device an easy and reliable fixing of the paperis assured. Furthermore the slit in the reinforced portion of theprinting cylinder is of such depth that it is capable of taking up theleading edge of the original corresponding to the upper marginal portionof the copy sheet which is to remain 7 clear.

Furthermore the moistening device controlled by the above mentioned camshaped surface is simplified and all the functions of several-parts 1 ofthose moistening devices used before, are reduced. The moistening deviceaccording to this contrivance is formed of one piece and entirely closedexcept the opening for the moistening felt.

A special fluid container and special tubes for leading the liquid asthey were used at theformer apparatus are not provided; it shows onlyone or several openings for an immediate moistening of the felt.Furthermore it is furnished with'a control lever working together withthe above mentloned cam shaped surface attached to the drum stiffeningbar. The point, around which the control lever is pivoting, in themeantime is also the bearing for the moistening device. Furthermore atthe opening or the openings of the moistening device little boxes areattached which represent a little fluid container as well as a closingdevice for the openings. By this device the former fluid container whichwas separated from the moistener has been replaced. These little boxesare sure inside and outside after a certain quantity of liquid haspassed through. The shape of the openings may be of any suitable form.

If these small liquid boxes are not applied a slit, provided inlongitudinal direction of the upper edge of the moistener may beprovided and may be closed by a narrow. U-shaped metal strip, or thelike. I

Furthermore the laying-on table for the sheets to be printed on isessentially simplified and by its provided shape it fulfills thefunction of several parts. As it is very. important that the feedingtable should have a completely even and rigid surface in order to permitthe provision of an even and uniform coating of solvent on the clearsheet by means of the moistening device, in prior duplicating machines'a separate reinforcing rail has been provided for the feeding table. Inaddition to being rather complicated and expensive, this arrangementalso had the inconvenience that often the feed table proper and thereinforcing rail incorporated therein did not have exactly the sameheight so that frequently the clear sheets introduced into the apparatusabutted against the reinforcing, rail. According to the principles ofthe present invention this inconvenience is eliminated by reinforcingthe feeding table by bending back its front marginal portion, which isdirected towards the bight of the printing cylinder and the counterpressure roller. Instead of prior paper guides which have been merelybolted laterally to the table, a simple and accurate guide is providedwhich is integral with the table proper and is obtained by punching outa strip of metal therefrom on three sides and bending it up verticallyalong the fourth side. Thus, a simple, inexpensive and eflicient feedingtable is provided.

In' the drawing one example of the apparatus according to the inventionis shown.

Fig. 1 shows a cross-section 'of the whole device and Fig. 2 showsanother modification of the moistening container.

The impressing drum I, the counter pressing roller 2 and the moisteningcontainer 3 are provided in a frame 4. In the impressing drum I is alongitudinal slit or recess 6, into which the original is placed withits front edge. The impressing drum l carries on its sides one or morebars or arms I, of which the one shows a cam shaped surface I. The lever8 attached tothe moistener, of which the pivot serves as pivot for themoistener too, travels on the curve 'I' in such a manner that themoistener is lifted up after each turn of the impressing drum l.

Furthermore curve 1' shows a recess or depression into which meshes alittle roller 8, attached to the free end of the controlling lever B. Bythis contrivance impressing drum I is kept in its initial position. Thecounter pressing roller 2 is rotatably mounted in the swivelling arms 5and is pressed against the impressing drum I by spring force. Thelaying-on table 9 is bent downward at 9'. The guiding bar III is punchedout of the laying-on table.

Fig. 2 illustrates a modified embodiment of the moistening deviceaccording to the invention. In this embodiment the container 3 holdingthe moistening felt is provided with a longitudinal slit on the upperportion thereof for introducing the moistening liquid. The slit may beclosed by slipping U-shaped member II on the container.

I claim:

1. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a rotatable printing cylinder having a single, integrallyformed narrow recess on its surface extending parallel to the axis ofsaid cylinder and at an obtuse angle to the surface thereof, said recesshaving relatively sharp edges and being capable of receiving and holdingthe folded back leading edge of a sheet of paper bearing a copyablemirror-script original, -a moistening means for moistening said clearsheets with said rapidly volatilizing solvent, and a pressure rollerco-operating with said printing cylinder for pressing a clear sheetagainst said original.

2. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a rotatable and hollow printing cylinder, an axiallyextending reinforced portion on the inner surface of said cylinder, asingle, integrally formed narrow recess having relatively sharp edgeswithin said reinforced portion forming an obtuse angle with the surfaceof said cylinder and being capable of receiving and holding the foldedback leading edge of a sheet of paper bearing copyable mirror-scriptoriginal, a moistening means for moistening said clear sheets with saidrapidly volatilizing solvent, and a pressure roller co-operating withsaid printing cylinder for pressing a clear sheet against said original.

3. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a rotatable and hollow printing cylinder, a plurality ofspokes associated with said cylinder, a shaft having a crank at one endrigidly connected to the said spokes, an axially extending reinforcedportion on the inner surface of said cylinder, a single, integrallyformed narrow recess having relatively sharp edges within saidreinforced portion forming an obtuse angle with the surface of saidcylinder and being capable of receiving and holding the folded backleading edge of a sheet of paper bearing copyable mirrorscript original,a moistening means for moistening said clear sheets with said rapidlyvolatilizing solvent, and a pressure roller co-operating with saidprinting cylinder for pressing a clear sheet against said original.

4. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a rotatable and hollow printing cylinder, a plurality ofspokes associated with said cylinder, a shaft having a crank at one endrigidly connected to the said spokes, an axially extending reinforcedportion on the inner surface of said cylinder, a single, integrallyformed narrow recess having relatively sharp edges within saidreinforced portion being capable of receiving and holding the foldedback leading edge of a sheet of paper bearing copyable mirror-scriptoriginal, a pivoted moistening device mounted on an operating lever, acam-like surface mounted on one of said spokes adapted to co-operatewith said operating lever for moving said moistening device into and outof operative position, and a pressure roller for pressing a clear sheetagainst said copyable original. J

5. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a rotatable and hollow printing cylinder, a plurality ofspokes associated with said cylinder, a shaft having a crank at one endrigidly connected to said spokes, a counter pressure roller co-operatingwith said cylinder, an axially extending 'co-operate with a roller atthe end of said operating lever whereby said moistening device will bemoved out of operative position when said roller is engaging said camsurface and said printing cylinder will be stopped in its initialposition when said roller enters said depression on said cam surface.

6. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprisinga machine frame, a hollow printing cylinder having spokes anda shaft rotatably mounted in said frame, a spring-held counter pressureroller co-operating with said printing cylinder, a single, integrallyformed narrow and axially extending recess having relatively sharp edgeson the surface of said printing cylinder capable of receiving andholding the folded back leading edge of a sheet of paper bearingcopyable mirror-script original, a pivoted moistening device including aquadrangular container, a moistening felt in said container having oneof its ends protruding therefrom, an opening on the upper part of saidcontainer, a closable small liquid tank inserted in said opening to feedliquid to said moistening felt, and cam-like means on one of the spokesof said printing cylinder for moving said-moistening device into and outof operative position.

7. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a machine frame, a, hollow printing cylinder having spokesand a shaft rotatably mounted in said frame, a spring-held counterpressure roller cooperating with said printing cylinder, a single,integrally formed narrow and axially extending recess having relativelysharp edges on the surface of said printing cylinder capable ofreceiving and holding the folded back leading edge of a sheet of paperbearing copyable mirror-script original, a pivoted moistening deviceincluding a quadrangular container, a moistening felt in said containerhaving its lower end protruding therefrom, a slit on the upper portionof said container, a U-shaped member for covering said slit, and

' cam-like means associated with said printing cylinder for controllingsaid pivoted moistening device. H

8. In a duplicating apparatus printing onto clear sheets previouslymoistened with a rapidly volatilizing solvent, the combinationcomprising a machine frame, a hollow printing cylinder rotatably mountedin said frame, a spring-held counter pressure printing cylinder, asingle, integrally formed narrow and axially extending recess havingrelatively sharp edges on the surface of said printing cylinder capableof receiving and holding the folded back leading edge of a sheet ofpaper bearing copyable mirror-script original, a feeding table mountedin said frame and having its front edge reinforced by means of bendingback a portion thereof, a paper guide integrally formed with saidfeeding table by punching out and bending upwards a portion thereof, amoistening roller co-operating with said means pivoted on said feedingtable, and cam-- like means associated with said printing cylinder tomove said moistening means into and out of operative position.

